ch 1 and 2 test vocab

Question 1

what is matter

Answer 1

anything that has mass and takes up space

Question 2

how is matter classified

Answer 2

into groups based on what makes it up ex: silver - element , sugar - compound, salad - mixture

Question 3

what is an element

Answer 3

a substance that cant be broken down into a simpler substance by simple chemical means

Question 4

what are elements made of

Answer 4

atoms

Question 5

what is an atom

Answer 5

smallest part of an element that still has all the properties of an element

Question 6

what are molecules

Answer 6

smallest unit of a substance that behaves like the substance (atoms bond together to form this)

Question 7

what are compounds

Answer 7

substances that are made up of atoms of different elements; contain 2 or more elements combined chemically

Question 8

what shows how many atoms of each element are in a molecule of the compound

Answer 8

chemical formula

Question 9

what are used to indicate when there is more than one atom of an element present

Answer 9

subscripts

Question 10

what are Infront of a chemical formula that indicate how many molecules are present

Answer 10

coefficients

Question 11

what are pure substances

Answer 11

matter that has a fixed composition and definite properties (elements and compounds)

Question 12

what are mixtures

Answer 12

combination of substances that aren’t chemically combined (jell-o)

Question 13

what two ways can mixtures be classified as

Answer 13

homo or heterogeneous

Question 14

what does homogeneous mean

Answer 14

parts of the mixtures are the same throughout

Question 15

what does heterogeneous mean

Answer 15

parts of the mixtures are not evenly distributed

Question 16

miscible meaning

Answer 16

able to be mixed

Question 17

immiscible meaning

Answer 17

wont remain mixed, will be able to see layers

Question 18

what are physical properties

Answer 18

characteristics that can be observed wo/ changing the identity of the substance

Question 19

examples of phys. props.

Answer 19

shape, color, odor, texture, state (use senses), boiling pt, melting pt, strength, hardness, magnetism (measured)

Question 20

what is density

Answer 20

physical property; measurement of how much matter is contained in a certain volume of a substance (not the same as weight)

Question 21

what does 1 mL =

Answer 21

1 cm cubed

Question 22

formula for desnity

Answer 22

mass/volume

Question 23

formula for mass

Answer 23

density x volume

Question 24

formula for volume

Answer 24

mass/ density

Question 25

units for mass

Answer 25

g or kg (kg convert to g)

Question 26

units for volume

Answer 26

liquid: mL or L (L convert to mL) solid: cm cubed

Question 27

units for density

Answer 27

liquid: g/mL solid: g/cm cubed

Question 28

what is a chemical property

Answer 28

how a substance changes into a new substance, either by combining with other elements or by breaking apart into new substances

Question 29

examples of chem. props. and explain

Answer 29

flammability- ability to burn. 2. Nonflammability- inability to burn. 3. Reactivity- the capacity to combine with another substance.

Question 30

m: 0.196g v: 150 mL

Answer 30

D=.0013g/mL cubed

Question 31

D=22.42 g/cm cubed v=42.8 cm cubed

Answer 31

m=959.58 g

Question 32

D=0.50 g/cm cubed v=87.3 cm cubed

Answer 32

m=43.65 g

Question 33

D=3.51 g/cm cubed m=4.2 g

Answer 33

v=1.20 cm cubed

Question 34

v=10.0 cm cubed m=69.6 g

Answer 34

D=6.96 g/cm cubed

Question 35

D=21.45 g/cm cubed m= 1.5 kg

Answer 35

v=69.93 cm cubed

Question 36

social science

Answer 36

deals with nature

Question 37

the sciences concerned with the study of inanimate natural objects, including physics, chemistry, astronomy, and related subjects

Answer 37

physical science

Question 38

the branch of science dealing with the physical constitution of the earth and its atmosphere

Answer 38

earth science

Question 39

science of matter and how it changes

Answer 39

chemistry; branch of physical science

Question 40

science of forces and energy

Answer 40

physics; branch of physical science

Question 41

study of the atmosphere and weather

Answer 41

meteorology; branch of earth science

Question 42

physical nature + history of the earth

Answer 42

geology; branch of earth science

Question 43

what is natural science

Answer 43

tries to understand how nature or the whole universe behaves

Question 44

organized series of steps to solve a problem

Answer 44

scientific method

Question 45

compares the values of items

Answer 45

bar graph

Question 46

shows continuously changing data

Answer 46

line graph

Question 47

shows all the parts of a whole

Answer 47

pie graph

Question 48

method of reducing the # of zeros in a very big or very small number + expressing them as a power of 10

Answer 48

scientific notation

Question 49

used by scientists to show the precision of a measurement

Answer 49

significant figures

Question 50

effects 1 or more physical props. of a substance wo/changing the identity of the substance

Answer 50

physical change

Question 51

happens when 1 or more substances are changed into entirely new substances that have different props/characteristics

Answer 51

chemical change

Question 52

what are si units

Answer 52

International System Of Units (SI) is the metric system that is used universally as a standard for measurements